Internal-combustion engine



A. FEHLMANN AND G. HINTERMANN.

INTERNAL COMBUSTION ENGINE.

APPLICATION FILED JUNE 12. I919.

Patented June 8, 1920.

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d m n .n a m ,MM m WM 0 *4 ADOBE FEHLMANN AND GGT'I'LIEB HINTERMANN, 0FBASED, SWITZERLAND.

INTERNAL-COMBUSTION ENGINE.

intense.

Application filed June 12,

To all whom it may concern Be it known that we, ADoLF FEHLMANN andGo'rrLmn HINTERMANN, both citizens of the Swiss Republic, and residentsof Basel, Switzerland, have invented new and useful Improvements inInternal-Combustion En gines, of which the following is a full, clear,and exact specification.

This invention relates to internal combustion engines and particularlyto explosion engines and has for its object a method of, and means for,driving such engines, by taroils, Diesel oils, and similar liquid fuelsof high boiling point.

According to the invention the method consists in vaporizing the liquidfuel outside the engine and mixing it with preheated air, in order toform therewith a mixture suitable for supply to an explosion engine. Theapparatus for carrying it out consists in that an air pipe which isfurnished with a preheating jacket and with a regulating valve isprovided with a branch 'pipe communicating therewith on both sides ofsaid regulating valve and inclosing a fuel supply nozzle and is furtherconnected to a vaporizing chamber designated to be heated by exhaustgases of the motor and inclosing a deflector in the form of a cap orthimble, freely accessible on the inside to the hot ex-. haust gases andforming with the heated side wall of the vaporizing chamber acirculation channel heated from inside and outside for the combustiblemixture to the end of complete vaporization of the fuel.

The accompanying drawing shows one form of apparatus embodying theinvention.

In the said drawing:

Figure 1 is a vertical longitudinal section of the apparatus.

Fig. 2 is a partial transverse section on the line AB of Fig. 1. a

An air-pipe a (Fig. 1) which is surrounded by a preheating jacket 7)serves to supply the combustion air and contains a regulating slidevalve 0 which can be adjusted at will and according to runningrequirements by means of a hand operated lever system not shown, so asto close or throttle the air pipe at according to the runningrequirements. The air pipe at is further provided with a permanentlyopen branch pipe a l communicating therewith on both sides of saidregulating valve 0 and in- Specification of Eetters Patent.

i919. Serial No. 303,747.

closlng a liquid fuel supply nozzle 7 insuch an arrangement that the aircurrent circulating through the branch pipe d draws in the fuel from thenozzle f, to which it is supplied from a float vessel, and carries italong with it into the main pipe at. The latter is connected to avaporizing chamber 9 heated by the hot exhaust gases of the motor. Thischamher 9 incloses a heating deflector h in the form of a cap orthimble, into which extends upward a vertical tube 71 connectedto theexhaust side of the motor, so that in running servlce the cap or thimbleh on its inside is subgected to the heating action of the exhaust gases.From the cap or thimble h the exhaust gases are conveyed at the lowerend thereof into a casing is inclosing the vapor- :izing chamber 9tocirculate around the outer side wall of the latter, whereupon theyenter thepreheating jacket 6 extending from the caslng k to preheat theair in the pipe at. The exhaust gases, the heat of which has thuscompletely been utilized on the one hand for heating the cap or thimbleh and on the other hand for heating the combustion air, escapes at m tothe outer air. The cap or thimble it forms with the side wall of thevaporizing chamber 9 a circulation channel n heated from inside andoutside, which, owing to a helical guide-rib 0 of the cap or thimble it,extends helically around the latter, so that the combustion mixtureentering the vaporizing chamber 9 impinges first upon the stronglyheated cap or thimble h and is then further exposed on a relatively longway inthe channel it to the heating action of the exhaust gases,whereupon it is drawn in by the motor through the suction tube gprovided with a throttle valve p (Fig. 2). There is thus obtained aperfect vaporization of the fuel together with a convenient heating ofthe mixture so as to insure a complete combustion thereof.

The supply of tar-oil, Diesel oil or other similar liquid fuel of highboiling point to the fuel nozzle f is effected by a fuel supply pipe 7'through the medium of a three-way cock .9 arranged in advance of saidnozzle.

Patented June 8, 192% For starting the motor, the three-way cock 8 ofthe nozzle f and w is a closing cover at the top of the vaporizingchamber.

What we claim is:

1. An apparatus for driving explosion engines bytar-oils, Diesel oilsand similar liquid fuels of high boiling point, comprising a vaporizingchamber, means for heating the same by means of exhaust gases of theengine, a cap or'thimble arranged within said vaporizing chamber forminga circula= tion channel with the side. wall thereof, means for heatingsaid cap or thimble from inside, an air pipe arranged to communicatewith said channel in the vaporizing chamber, a preheating jacketsurrounding said air pipe and designated to be supplied by exhaustgases, a regulating valve in said air pipe, a branch pipe connectedtherewith on both sides of the regulating valve and a fuelnozzlearranged in'thesaid branch pipe, for the purpose of conveying a mixtureof fuel and preheated air through said circulation channel heated frominside and outside, substantially as described.

2. 'An apparatus for driving explosion en-- gines by tar-oils, Dieseloils .and similar liquid fuels of high boilingpoint, comprising avaporizing chamber, a casing inclosing said chamber for heating the samefrom outside, a cap or. thimble arranged within the vaporizing chamberforming a circulation channel with the side wall thereof, means forheating said cap or thimble from inside by means of exhaust gases of theengine, said cap or thimble having its lower end in communication withsaid casing, an air pipe arranged to communicate with said circulationchannel in the vaporizing chamher, a preheating jacket surrounding saidair pipe .and extending from said casing, a regulating valve in said airpipe, a branch pipe connected therewith on both sides of the regulatingvalve and a fuel nozzle arranged in the said branch pipe, for thepurpose of conveying a mixture of fuel and preheated air through saidcirculation channel heated from inside and outside, substantially asdescribed.

3. An apparatus for driving explosion engines by tar-oils, Diesel oilsand similar liquid fuels of high boiling. point comprissaid casing, anair pipe arranged to communicate with said circulation channel in thevaporizing chamber, a preheating jacket surrounding said air pipe andextending from said casing, a regulating valve in said air pipe, abranch pipe connected therewith on both sides of the regulating valveand a fuel nozzle arranged in the said branch pipe, for the purpose ofconveying a mixture of fuel and preheated air through said circulationchannel heated from inside and outside, substantially as described.

4. ,An apparatus for driving explosion engines by tar-oils, Diesel oilsand similar liquid fuels of high boiling point, comprising a vaporizingchamber, means forheating the same by means of exhaust gases of theengine, a cap or thimble arranged within said vaporizing chamber forminga circulation channel with the side wall thereof, means for heating saidcap or thimble from inside, an air pipe arranged to communicate withsaid channel in the vaporizing chamber, a preheating jacket surroundingsaid air pipe and designated to be supplied by exhaust gases, aregulating valve in said air pipe, a branch pipe connected therewith onboth sides of the regulating valve and a fuel nozzle arranged in thesaid branch pipe, said nozzle being connected through the medium of athree-way cock with a supply pipe for running service fuel and with asupply pipe for a starting fuel, substantially as described.

In .witness whereof we have hereunto signed our names this 8th day ofMay, 1919, in the presence of two subscribing witnesses. ADOLF FEHLMANN. I GO'ITLIEB HINTERMANN. Witnesses:

ALFRED D. MASON, AMAND BRAUN.

